[dns-operations] I missed the announcement: .ARPA has been deleted

bert hubert bert.hubert at netherlabs.nl
Sat Feb 13 21:40:00 UTC 2010

On Sat, Feb 13, 2010 at 01:12:07PM -0800, Matthew Dempsky wrote:
> 2010/2/13 Lutz Donnerhacke <lutz at iks-jena.de>:
> > If there
> > is a NXDOMAIN response, the resolver will negativly cache the nonexistance
> > of the whole subtree.
> Do any resolvers actually do this?  RFC 2308 says to only cache
> NXDOMAIN responses for the same <QNAME, QCLASS> tuple.

No, you can't actually do this because a number of implementations mess up
the empty non-terminal case (including the PowerDNS Authoritative Server). 
Plus of course the dns load balancers..

But it is highly tempting, especially for NXDOMAINS coming from the root
servers. I bet the roots would appreciate this too.

I think I recall there was another reason for not doing this, but I can't
remember the details.


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